E=mc2

Aobert.jpg (33 KB)

Most people recognize this celebrated equation as something to do with Einstein’s theory of relativity, but most people have no idea what it means.



  • Leave A Comment

    Subscribe
    Notify of
    22 Comments
    Inline Feedbacks
    View all comments
    diabeetus

    Jew has a big nose.

    knogoodidleft

    Energy equals mass x the velocity of light squared.

    knogoodidleft

    ahh derrrr energy = mass x Velocity of light squared

    njch412

    most people have no idea what his theory of relativity means let alone e=mc^2.

    The Matrix: Rebooted

    Actually the only it has to do with relativity is that it was published the same year, 1905, as special relativity.

    Sorryyoulost

    Technically it would be speed.

    (Velocity is speed with direction)

    The Matrix: Rebooted

    ,
    You are correct about the difference between speed and velocity.
    But since the speed of light is always the same regardless of frame of reference, then the velocity of light of is always equal to the speed of light.

    tiny

    Madder is enerdgee! 😀

    Caio

    It has to do with the amount of energy there is in an atom. That’s Einstein’s little unintentional contribution to the A-Bomb. In fact, without that, probably no one would have even thought of the A-bomb at all. Hmmmmmm…

    Nyng G

    Yeah that’s great that’s still not what it “means” thats just what the formula stands for.

    What it means is: Regaurdless if an object(body)is moving it retains a certain energy as long as it has a mass.

    eric

    Of course the “m” stands for relativistic mass, as opposed to normal mass. The equation is actually:

    e = (m*c^3) / sqrt(c^2 – v^2)

    where m is normal mass, c is the speed of light in a vacuum, and v is the velocity of the mass.

    At low velocities, this reduces to e=m*c^2. As the velocity of the mass approaches the speed of light, the denominator approaches zero and the energy becomes infinite.

    Kaze

    What then happens if you get a flashlight in space to go 99.9 percent the speed of light, then turn it on?

    Will light then be going double the speed of light?

    The Matrix: Rebooted

    , you are correct that this is the abbreviated equation and that m refers to the rest mass. That’s trivially true because of course a mass that has is not at rest also has kinetic energy.
    Your equation is wrong though, it has the right boundary conditions at v=0 and v=c, but but its the wrong equation. The relativistic mass is m/sqrt(1-v^2/c^2), just substitute relativistic mass into the original equation to get total energy. The difference is that the taylor series at low velocities should be approx. Newton’s 2nd law.
    I believe mass-energy equivalence can be derived independently from special relativity and that it was only later did Einstein correct E=mc^2 by including terms for the relativistic mass. Could be wrong on that though, historically, they were close.

    The Matrix: Rebooted

    @Kaze, nope, speed of light is independent to frame of reference. If you were to do your experiment, you would be experiencing time dilation. However, the photons would not be, so from your frame of reference the photons would still be traveling their usual speed. Of course, to an outside observer, the photons would be traveling the speed of light, because they see you traveling 99% of the speed of light and the photon are speeding away from you.
    I haven’t had coffee yet to that explanation might be wonky.

    The Matrix: Rebooted

    , I worked out the taylor series for your expression and I guess it does work out for total energy. I guess in your express relativistic mass would be mc/sqrt(c^2-v^2); I guess I’ve just never seen it written out like that. Eggs on my face, serves me right for posting before coffee.

    natedog

    God does not play dice. he plays Texas Hold ’em.

    garbledxmission

    Wow reboot, you must be a downright maniac at parties.

    eric

    reboot: No problem… relativity still makes my head hurt. 8)

    Peaches LaRue

    ..and that’s just Special Reletivity.

    Wait till you get to General.

    Mmmm, tensors.

    /not to mention QFT, where the math is so complicated you multiply pictures instead of letters

    Phyreblade


    I believe your explanation is correct. The speed of light is absolute, hence there can be no accelleration beyond that. Externally, the max observed speed would be the speed of light

    P.S. I thought I was bad. I’d never have voluntarily calculated the Taylor series for Erics expression. I would have just looked it up… LOL

    natedog

    “Scientists freeze beam of light”
    news.bbc.co.uk/1/hi/sci/tech/3308109.stm

    Advertisements Alcohol Animated Images Architecture Art Awesome Things Batman Bikinis Black and White Cars Comic Books Computers Cosplay Cute As Hell Animals Donald Trump Drugs Fantasy - Science Fiction Fashion Food Forum Fodder Gaming Humor Military Motorcycles Movie Posters Movie Reviews Movies Music Music Videos Nature NeSFW Politics Religion Science! Sexy Sports Star Trek Star Wars Technology Television Vertical Wallpaper Wallpaper Weapons Women WTF

    480 x 360 500 x 281 500 x 375 500 x 500 500 x 750 600 x 450 600 x 600 600 x 750 600 x 800 600 x 900 640 x 480 640 x 640 640 x 800 640 x 853 640 x 960 720 x 720 720 x 960 750 x 600 800 x 600 800 x 800 960 x 720 960 x 960 1024 x 683 1024 x 768 1080 x 1080 1080 x 1350 1200 x 630 1200 x 800 1200 x 900 1280 x 720 1280 x 800 1280 x 960 1280 x 1024 1440 x 900 1600 x 900 1600 x 1200 1680 x 1050 1920 x 1080 1920 x 1200 2048 x 1536 2560 x 1440 2560 x 1600 3024 x 4032 3840 x 2160 x

    ABoringDystopia Amoledbackgrounds AnimalsBeingDerps ATBGE awfuleverything Celebhub Celebs CityPorn comicbookart conceptart cosplaygirls Cyberpunk EarthPorn Eyebleach Faces FreckledGirls funny General Uploads gentlemanboners hmmmm Images Sub Space ImaginaryStarships ImaginaryTechnology InfowarriorRides interestingasfuck MarchAgainstNazis marvelstudios MCS Plus memes MilitaryPorn nocontextpics OldSchoolCool pictures PoliticalHumor PrequelMemes PropagandaPosters RetroFuturism sbubby StarshipPorn startrekmemes Storminator Super News Thanks I Hate It UrbanHell wallpaper

  • here's some related content from the store: